Add header and event detail pages, fix copyright, rename essay

- Detail pages for all 18 HTTP headers with descriptions, example usage,
  direction badges (request/response/both), and live demos for SX-Prompt,
  SX-Trigger, SX-Retarget
- Detail pages for all 10 DOM events with descriptions, example usage,
  and live demos for beforeRequest, afterSettle, responseError,
  validationFailed
- Header and event table rows now link to their detail pages
- Fix copyright symbol on home page (was literal \u00a9, now actual ©)
- Rename "Godel, Escher, Bach" essay to "Strange Loops" with updated summary
- Remove duplicate script injection from bootstrapper page

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

sx/sx/docs.sx

@@ -34,15 +34,27 @@
           (th :class "px-3 py-2 font-medium text-stone-600" "Description")))
         (tbody rows)))))
 
-(defcomp ~doc-headers-row (&key name value description)
+(defcomp ~doc-headers-row (&key name value description href)
   (tr :class "border-b border-stone-100"
-    (td :class "px-3 py-2 font-mono text-sm text-violet-700 whitespace-nowrap" name)
+    (td :class "px-3 py-2 font-mono text-sm whitespace-nowrap"
+      (if href
+        (a :href href
+           :sx-get href :sx-target "#main-panel" :sx-select "#main-panel"
+           :sx-swap "outerHTML" :sx-push-url "true"
+           :class "text-violet-700 hover:text-violet-900 underline" name)
+        (span :class "text-violet-700" name)))
     (td :class "px-3 py-2 font-mono text-sm text-stone-500" value)
     (td :class "px-3 py-2 text-stone-700 text-sm" description)))
 
-(defcomp ~doc-two-col-row (&key name description)
+(defcomp ~doc-two-col-row (&key name description href)
   (tr :class "border-b border-stone-100"
-    (td :class "px-3 py-2 font-mono text-sm text-violet-700 whitespace-nowrap" name)
+    (td :class "px-3 py-2 font-mono text-sm whitespace-nowrap"
+      (if href
+        (a :href href
+           :sx-get href :sx-target "#main-panel" :sx-select "#main-panel"
+           :sx-swap "outerHTML" :sx-push-url "true"
+           :class "text-violet-700 hover:text-violet-900 underline" name)
+        (span :class "text-violet-700" name)))
     (td :class "px-3 py-2 text-stone-700 text-sm" description)))
 
 (defcomp ~doc-two-col-table (&key title intro col1 col2 rows)
@@ -88,7 +100,8 @@
       (~doc-headers-row
         :name (get h "name")
         :value (get h "value")
-        :description (get h "desc")))
+        :description (get h "desc")
+        :href (get h "href")))
       headers))))
 
 ;; Build two-col table from a list of {name, desc} dicts.
@@ -98,7 +111,8 @@
     :rows (<> (map (fn (item)
       (~doc-two-col-row
         :name (get item "name")
-        :description (get item "desc")))
+        :description (get item "desc")
+        :href (get item "href")))
       items))))
 
 ;; Build all primitives category tables from a {category: [prim, ...]} dict.